Vibration Suppression of Cantilever Using Piezoelectric Actuator Through Optimal Design for Actuator Position and Control Parameters

Vibration suppression is an extremely important aspect in mechatronic equipment, and the placement of actuators/sensors and control system design greatly impacts vibration control performance. In this study, a simultaneous optimal design system for the actuator position and control system is constructed. As a preliminary study, the vibration suppression problem of a flexible cantilever using a piezoelectric element as an actuator is addressed. The simultaneous optimal design system reproduces the motion behavior of the mechanism, including the control system, by simulation using multi-body dynamics software, and searches for the optimal actuator position and compensator parameters in combination with optimization algorithms. The multi-body dynamics software calculates the vibration response based on the elastic deformation of the cantilever and reproduces the force generated by the piezoelectric actuator on the analytical model. The validity of the constructed system is verified through simulations and experiments.